A diamond ‘Diadea’ dress ring by Cartier, the front applied with a series of partially articulated marquise-shaped collets set with brilliant-cut diamonds, the shoulders further accented with brilliant-cut diamonds, to a tapered band, stamped ‘J C’ and signed ‘Cartier’, with French eagle’s head guarantee and common control marks for 18ct gold, serial number ‘975427’, cased, total diamond weight approximately 1.60 carats, ring size L. £4,000-£6,000